A aqueous solution of a weak base has

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

0.050\,\text{M}

aqueous solution of a weak base

\mathrm{B}

has

pK_b = 4.20

. What is the percent ionization of

\mathrm{B}

in this solution at

25\,^{\circ}\mathrm{C}

? (a) 1.8\% (b) 3.6\% (c) 7.9\% (d) 0.36\%